From wilson at physics.mcmaster.ca Sun Mar 2 18:04:40 2003 From: wilson at physics.mcmaster.ca (Christine Wilson) Date: Sun, 2 Mar 2003 18:04:40 -0500 (EST) Subject: [asac]ASAC March telecon agenda Message-ID: Hi, everyone, A preliminary agenda for our telecon next Wednesday can be found at http://www.cv.nrao.edu/%7Eawootten/mmaimcal/asac/asacmar03agenda.html This agenda includes a link to a draft agenda for our next face-to-face meeting. This must still be considered very much a draft, as we should get some charges from the ALMA Board in the next couple of weeks. I'm sorry this is so late coming and is still preliminary, but Al Wootten has been away at Arecibo and the ALMA Board meeting for much of the last week and NRAO has been closed due to snow. Al or I will distribute the call-in numbers as soon as we can get them! Also, welcome to our new North American members, Chris Carilli, Phil Myers, and Jean Turner! The continuing North American members are Lee Mundy and myself. Cheers, Chris From momose at mx.ibaraki.ac.jp Mon Mar 3 04:00:07 2003 From: momose at mx.ibaraki.ac.jp (Munetake MOMOSE) Date: Mon, 3 Mar 2003 18:00:07 +0900 Subject: [asac]question about the correlator upgrade Message-ID: <20030303090009.23629@msv1u.nro.nao.ac.jp> Hi, everyone, I have a question about the upgrade plan of the baseline correlator. Recently I'm aware that the maximum number of frequency channels in the memo provided by John Webber in last telecon http://www.cv.nrao.edu/~awootten/mmaimcal/New_filter.htm seems different from that in the ALMA Memo 441, which originally introduced the upgrade plan. In former memo the maximum seems 4096 (=32 x 128), but 8192 in the ALMA Memo 441. Could someone tell which the correct number is at this moment ? Sorry for the late comment. ------------------------------------------ Munetake MOMOSE Inst. Astrophysics & Planetary Sciences, Faculty of Science, Ibaraki University Fax: +81-29-228-8355 e-mail: momose at mx.ibaraki.ac.jp ------------------------------------------ From awootten at nrao.edu Mon Mar 3 21:13:19 2003 From: awootten at nrao.edu (Al Wootten) Date: Mon, 3 Mar 2003 21:13:19 -0500 Subject: [asac]Call-in info Message-ID: <15972.3007.668660.44194@polaris.cv.nrao.edu> Weds 5 March 2003 1530 UT phone numbers DIAL-IN NUMBERS: USA Toll Free Number: 877-939-1574 USA Toll Number: +1-712-257-0409 PASSCODE: 56173 From awootten at nrao.edu Fri Mar 14 17:38:18 2003 From: awootten at nrao.edu (Al Wootten) Date: Fri, 14 Mar 2003 17:38:18 -0500 Subject: [asac]Agenda for 2003 April 2 3 Meeting Message-ID: <15986.23002.440048.507409@polaris.cv.nrao.edu> Dear ASAC Member: I have added some reading material links to the modified agenda Chris posted before she left and posted it at: http://www.cv.nrao.edu/~awootten/mmaimcal/asac/asacgrenobleagendav2.0.html We expect additional materials, especially where noted; I'll send notice of those as they become available. Clear skies, Al +--------------------------------------------------------+ | Alwyn Wootten (http://www.cv.nrao.edu/~awootten/) | | Project Scientist, Atacama Large Millimeter Array/US | | Astronomer, National Radio Astronomy Observatory | | 520 Edgemont Road, Charlottesville, VA 22903-2475, USA | | (434)-296-0329 voice Help us build The ALMA| | (434)-296-0278 FAX {> {> {> {> | +----------------------------------^-----^-----^-----^---+ From soliver at nrao.edu Mon Mar 24 15:26:42 2003 From: soliver at nrao.edu (Stacy Oliver) Date: Mon, 24 Mar 2003 13:26:42 -0700 Subject: [asac][almanews] ALMA Memos 448, 449 and 450 Released Message-ID: ALMA MEMO #448 UV intensity near AOS and OSF Seiichi Sakamoto (NAOJ) 2003/03/23 Keywords:site testing, ultraviolet (UV), safety UV intensity near the AOS and OSF sites in northern Chile was measured with handheld UVA and UVB radiometers and was compared with that taken at Socorro AOC, Nobeyama, and Mitaka. Typical UVA opacity was about 0.4 at Pampa La Bola near the AOS site, about 0.6 both at San Pedro de Atacama near the OSF site and at Nobeyama, and about 0.7 at Mitaka (best conditions), respectively. The UVA intensity toward the Sun measured at Pampa La Bola near the sunset (elevation ~20 degrees) was still comparable with the highest value recorded at Mitaka. The difference becomes even more outstanding in UVB. The UV Index, which chiefly reflects UVB intensity, measured with a handheld UVB radiometer is in reasonable agreement with that predicted with the satellite data, and both consistently indicate that the UVB is extremely high at the AOS and OSF sites. The UV Index typically exceeds 7 (high) for 6 hours near the AOS site. View a pdf version of ALMA Memo #448. http://www.alma.nrao.edu/memos/html-memos/alma448/memo448.pdf Download a postscript version of ALMA Memo #448. http://www.alma.nrao.edu/memos/html-memos/alma448/memo448.ps -------------------------------------------------------------------------------- ALMA MEMO #449 Noise Evaluation of Hybrid Photonic Local Oscillator at 500 GHz Y. Sekimoto, A. Ueda, T. Okuda (NAOJ), E. Bryerton (NRAO), M. Sugimoto, H.Matsuo, S. Yokogawa, T. Noguchi, M. Ishiguro (NAOJ), H. Ito, T. Nagatsuma, A. Hirata (NTT), and J. Payne (NRAO) 2003/03/20 Keywords: Photonic LO, hybrid option, SIS noise, multiplier A hybrid photonic local oscillator, which consists of a multiplier, a W-band power amplifier, a W-band photomixer, and a laser system, has been demonstrated to be sufficiently powerful to pump a superconducting-insulator-superconducting tunneling junction (SIS) mixer at 490 GHz. The noise temperature at 490 GHz was 135 K, which is comparable with that pumped by Gunn oscillator + multipliers. Wideband spectrum of the multiplier is also measured. View a pdf version of ALMA Memo #449. http://www.alma.nrao.edu/memos/html-memos/alma449/memo449.pdf Download a postscript version of ALMA Memo #449. http://www.alma.nrao.edu/memos/html-memos/alma449/memo449.ps -------------------------------------------------------------------------------- ALMA MEMO #450 Heterogeneous Imaging with the ALMA Compact Array Melvyn Wright (University of California, Berkeley) 2003/03/21 Keywords: Heterogeneous Imaging, ALMA Compact Array, ACA. The ALMA Compact Array will be a powerful telescope at sub-millimeter wavelengths for imaging the large scale structures which are not well sampled by ALMA. In this memo, we propose an observing mode for the ACA as a heterogeneous array of 7 and 12 m antennas. We compare three compact configurations: the ACA (12 x 7 m), a heterogeneous ACA with 4 x 12 m antennas, and the most compact ALMA configurations with 60 x 12 m antennas. We present tables of the synthesised beam FWHM, brightness sensitivity and sidelobe levels for source declinations +30, 0 and --30 degrees. Using the ACA as a heterogeneous array with four 12 m antennas doubles the collecting area of the ACA and provides synthesised beams and brightness sensitivities which fill a useful parameter space between the ACA alone and the most compact configurations of the ALMA telescope. Heterogeneous observing provides more short spacings and a good cross calibration of the 7 and 12 m antennas. Calibration of the bandpass and polarization characteristics can be improved by scheduling a few more 12 m antennas for the ACA at times when these calibrations are needed. The location of the ACA in relation to the ALMA array, and the correlator configuration should be considered with these possibilities. View a pdf version of ALMA Memo #450. http://www.alma.nrao.edu/memos/html-memos/alma450/memo450.pdf Download a postscript version of ALMA Memo #450. http://www.alma.nrao.edu/memos/html-memos/alma450/memo450.ps _______________________________________________ Almanews mailing list Almanews at listmgr.cv.nrao.edu http://listmgr.cv.nrao.edu/mailman/listinfo/almanews From wilson at physics.mcmaster.ca Wed Mar 26 12:55:17 2003 From: wilson at physics.mcmaster.ca (Christine Wilson) Date: Wed, 26 Mar 2003 12:55:17 -0500 (EST) Subject: [asac]Agenda for 2003 April 2 3 Meeting In-Reply-To: <15986.23002.440048.507409@polaris.cv.nrao.edu> Message-ID: Hi, everyone, This email is just a reminder that the agenda for the ASAC face-to-face meeting next week can be found at http://www.cv.nrao.edu/%7Eawootten/mmaimcal/asac/ASAC-ChargeApr03.html The agenda includes links to various documents which you should review prior to the meeting. (For our new members, we do not send out a package of material in hardcopy before the meeting, but expect members to download and print or save what they need.) There will still be some new material added to this agenda, hopefully in the areas of Front Ends, Y++ configuration, Software, and Correlators, so please check the agenda daily and especially before you leave for your travels to Grenoble to make sure you have everything that has been posted. I apologize that some of the documentation is still missing. We have requested material repeatedly and some of it is very slow in coming. Chris Wilson From wilson at physics.mcmaster.ca Wed Mar 26 16:37:36 2003 From: wilson at physics.mcmaster.ca (Christine Wilson) Date: Wed, 26 Mar 2003 16:37:36 -0500 (EST) Subject: [asac]Agenda for 2003 April 2 3 Meeting In-Reply-To: Message-ID: Hi, everyone, By mistake, I sent you the link to the charge rather than the full agenda, which is at http://www.cv.nrao.edu/~awootten/mmaimcal/asac/asacgrenobleagendav2.0.html Sorry about that, Chris From awootten at nrao.edu Thu Mar 27 15:54:22 2003 From: awootten at nrao.edu (Al Wootten) Date: Thu, 27 Mar 2003 15:54:22 -0500 Subject: [asac]More reading material in updated agenda Message-ID: <16003.25854.264445.920547@polaris.cv.nrao.edu> Folks, I'm back from the AMAC meeting. Some additional materials have been added to the lot at the ASAC agenda at: http://www.cv.nrao.edu/~awootten/mmaimcal/asac/asacgrenobleagendav2.0.html New materials are generally accompanied by a 'NEW!' cartoon. Clear skies, Al +--------------------------------------------------------+ | Alwyn Wootten (http://www.cv.nrao.edu/~awootten/) | | Project Scientist, Atacama Large Millimeter Array/US | | Astronomer, National Radio Astronomy Observatory | | 520 Edgemont Road, Charlottesville, VA 22903-2475, USA | | (434)-296-0329 voice Help us build The ALMA| | (434)-296-0278 FAX {> {> {> {> | +----------------------------------^-----^-----^-----^---+ From awootten at nrao.edu Fri Mar 28 18:02:13 2003 From: awootten at nrao.edu (Al Wootten) Date: Fri, 28 Mar 2003 18:02:13 -0500 Subject: [asac]Updated draft FE Spec document Message-ID: <16004.54389.790714.259546@polaris.cv.nrao.edu> Folks, Gie Han Tan has provided an updated version of the FE spec document, version 2.2, that can be used for further distribution. Thanks to the front end group for providing this document, which supersedes the earlier version which was distributed. I have attached the text of this document to the ASAC agenda for next week under item 7, Front End, to be discussed at the end of 2 April. Direct link: http://www.cv.nrao.edu/~awootten/mmaimcal/asac/FE-SPECV2_2.doc Clear skies, Al From awootten at nrao.edu Sat Mar 29 09:57:34 2003 From: awootten at nrao.edu (Al Wootten) Date: Sat, 29 Mar 2003 09:57:34 -0500 Subject: [asac]Interim response to Technical Review Message-ID: <16005.46174.812196.239532@polaris.cv.nrao.edu> Tim has OK'ed the distribution to the ASAC of our AIPS++ Project response to the Interim Review Report. You can pick it up at: http://www.aoc.nrao.edu/~smyers/aips++/review/aipstr_response.pdf Let the ASAC know that this is just a draft response, and that we expect the final report on April 1. This will be pretty close to the final one I expect, and I dont think there is anything controversial here anyway. cheers, Steve From awootten at nrao.edu Mon Mar 31 10:07:44 2003 From: awootten at nrao.edu (Al Wootten) Date: Mon, 31 Mar 2003 10:07:44 -0500 Subject: [asac]Correction FE specs Message-ID: <16008.22976.869759.271507@polaris.cv.nrao.edu> Folks--I received the following email from Gie Han Tan. I have replaced the previously linked document with the new version, however with the same number as I am en route to the meeting now and cannot do fancy file manipulations. See you soon. Clear skies, Al Dear all, Unfortunately last Friday I was too much in a hurry to send out the updated FE specs & reqs document which resulted in distributing the wrong version. Attached you will find the correct version, 2.4. Please use this document also for further distribution to the ASAC members. I want to emphasize that this is still a not approved draft document. It needs further input from the SE&I IPT and final approval by the JAO. Regards, Gie Han -- Gie Han Tan ALMA European Front End project manager